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                [CERC2016]Hangar Hurdles                </h1>
                <p>时间限制：40s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
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                                <h3>题目描述</h3><p><div>你正在评估一些关于一个巨型飞机仓库的建设计划。飞机仓库的地面可以表示为n行n列的网格图，其中每个格子要</div>
<div>么是空的，要么有障碍物。行从上到下依次被编号为1到n，列从左到右依次被编号为1到n。存放飞机零件的大型集</div>
<div>装箱能在飞机仓库的地面上自由移动是很重要的。我们可以将每个集装箱看作一个以某个格子为中心的边平行于坐</div>
<div>标轴的正方形。对于一个奇数k，一个尺寸为k的集装箱是一个包含k行k列的正方形。一个集装箱的坐标为其中心格</div>
<div>子的坐标。集装箱可以向上下左右移动，但不能碰到障碍物，且不能移出仓库的边界。给定q对格子A_k和B_k，对</div>
<div>于每对格子，请找到能从A_k移动到B_k的集装箱的最大尺寸，注意这个尺寸也要是一个奇数。</div>
<div></div></p><hr/><h3>输入格式</h3><p><div>第一行包含一个正整数n(2&lt;=n&lt;=1000)，表示仓库的尺寸。</div>
<div>接下来n行，每行n个字符，描述整个仓库，其中&ldquo;.&rdquo;表示空格子，&ldquo;#&rdquo;表示障碍物。</div>
<div>接下来一行包含一个正整数q(1&lt;=q&lt;=300000)，表示询问的个数。</div>
<div>接下来q行，每行4个正整数r_A,c_A,r_B,c_B(1&lt;=r_A,c_A,r_B,c_B&lt;=n)，分别表示A和B的坐标。</div>
<div>输入数据保证A和B是不同的空格子。</div>
<div></div></p><hr/><h3>输出格式</h3><p><div>输出q行，每行一个整数，对于每个询问输出最大尺寸，如果不存在解，那么输出0。</div>
<div>
<div></div>
</div></p><hr/><h3>样例输入</h3><pre>
7
.....#.
...#.#.
....#..
....###
....#..
#......
.......
5
2 5 5 2
2 5 3 6
2 2 6 3
2 2 6 6
1 1 7 7</pre><hr/><h3>样例输出</h3><pre>1
0
3
1
1</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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